.preview {
    height: calc(100vh);
    background: url('../assets/img/ba.png') no-repeat center center;
    background-size: cover;
}

.list {
    background: rgba(255, 255, 255, 0.96);
    width: 335px;
    margin: 0 auto;
    border-radius: 0 0 18px 18px;
    h3 {
        text-align: center;
        padding: 29px 0;
    }
    li {
        font-size: 18px;
        color: #4a4a4a;
        margin-bottom: 33px;
    }
}

.list-nav {
    padding-bottom: 63px;
    padding-left: 37px;
}

.icon-shangjiantou {
    text-align: center;
    display: block;
    font-size: 30px;
    color: black;
}
.nav-two{
    padding-left: 20px;
    padding-top: 26px;
    li{
        color:#000000;
    }
}